<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1 style="background-color: #ffffff;">标题</h1>
    <p style="background-color: #666666;">灰色</p>
    <p style="background-color: #ff0000;">红</p>
    <p style="background-color: #00ff00;">绿</p>
    <p style="background-color: #0000ff;">蓝</p>
    <p style="background-color: #ffff00;">黄色</p>
    <p style="background-color: #ff00ff;">洋红</p>

    <p style="background-color: #00ffff;">青色</p>
    <hr>
    <p style="background-color:rgb(255,255,255)">白色</p>
    <p style="background-color:rgb(255,0,0)">红色</p>
    <p style="background-color:rgb(0,255,0)">绿色</p>
    <p style="background-color:rgb(0,0,255)">蓝色</p>


</body>
</html>